ScienceDaily: Astronomy News |
| Jupiter's moons remain slightly illuminated, even in eclipse Posted: 20 Jun 2014 07:23 AM PDT Astronomers have found that Jupiter's Galilean satellites (Io, Europa, Ganymede, and Callisto) remain slightly bright (up to one millionth of their normal state) even when in the Jovian shadow and not directly illuminated by the Sun. The effect is particularly pronounced for Ganymede and Callisto. |
| NASA's swift satellite tallies water production of Mars-bound comet Posted: 19 Jun 2014 05:54 PM PDT In late May, NASA's Swift satellite imaged comet Siding Spring, which will brush astonishingly close to Mars later this year. These optical and ultraviolet observations are the first to reveal how rapidly the comet is producing water and allow astronomers to better estimate its size. |
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